#include"add.h"

int main()
{
  int x = 20;
  int y = 10;

 int ret1 = add(x,y);
 printf("x+y的值 = %d\n", ret1);

 int ret2 = sub(x,y);
 printf("x-y的值 = %d\n", ret2);

  return 0;
}
